boost库读写Json字符串

boost库中property_tree

0.头文件

相关头文件为：

#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>

using namespace boost::property_tree;

1.读Json字符串

1.1 读简单值

auto description = pt.get<std::string>("description");
auto version = pt.get<int>("version");

1.2 读一组对象

for (auto ptItem : pt.get_child("list"))
{
   std::string key = ptItem.first;
   std::string val = ptItem.second.data();
}

1.3  数组中包含对象解析

# test.json文件
{
"code":"0",
"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
}

	boost::property_tree::ptree pt, temp_pt;
	boost::property_tree::json_parse